I don't use sfp+ modules for twisted pair... It didn't cost anymore to get nics and switches with the ports I need vs sfp+ and transceivers; although there's a lot fewer switches to choose from. 30 meters feels like a lot for most homes. 10g-base-T spec calls for 100m on cat6a and 55m on cat6. Running on cat5(e) isn't to spec, but largely works in a home environment where you tend not to have to deal with a lot of crosstalk from dense conduit.

And the benefit is I didn't have to run new cable. Lots of homes have some twisted pair in the wall, very few have fiber in the wall. Homes from the late 90s on probably have cat5 for phone lines.

Sure, 10GBASE-T works. It's just not very good overall and you should plan to put your 10G on fiber any time you can. It's not particularly expensive or complicated. If you can't, then sure, use -T.